Mitsubishi WNMA080408 MC5015 Carbide Turning Inserts for Cast Iron Machining
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MITSUBISHI WNMA080408 MC5015
High-Speed Cast Iron Authority | Advanced CVD Coated Carbide
Product Overview
The Mitsubishi WNMA080408 MC5015 is a heavy-duty, double-sided 80° hexagonal (Trigon) negative insert specifically engineered for the high-efficiency machining of cast iron. Featuring the specialized MC5015 CVD coating, this insert excels in abrasive wear resistance and thermal stability. It is the premier choice for CNC lathe operations involving gray cast iron (GG) and ductile cast iron (GGG), ensuring consistent performance even in high-velocity production environments.
ISO Designation Identification
Trigon 80°
Negative 0°
Tolerance
No Chipbreaker
IC 12.7mm
Thick 4.76mm
Radius 0.8mm
Metric vs. Imperial Comparison
| Technical Features | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | WNMA 080408 | WNMA 432 |
| Inscribed Circle (IC) | 12.7 mm | 0.500 inch |
| Thickness | 4.76 mm | 0.187 inch |
Grade & Geometry: MC5015 CVD Specialist
The MC5015 grade belongs to Mitsubishi's high-performance cast iron turning series. It features a thick, multi-layered Alumina (Al2O3) coating that acts as a powerful thermal barrier, allowing for high cutting speeds without sacrificing edge integrity. The WNMA (Flat top) geometry without a chipbreaker is designed for stable, heavy-duty cutting where the material (cast iron) naturally breaks into short chips, maximizing the strength of the cutting edge.
Recommended Cutting Parameters
Optimized for Gray & Ductile Cast Iron (K-Class):
- Cutting Speed (Vc): 200 - 450 m/min (650 - 1470 SFM)
- Feed Rate (f): 0.15 - 0.45 mm/rev (0.006 - 0.018 ipr)
- Depth of Cut (ap): 0.5 - 4.0 mm
*Note: Running at higher speeds helps activate the CVD coating's thermal protective properties.*
Required Tooling:
Shop Compatible MWLNR / DWLNR Tool HoldersCustomer Feedback
⭐⭐⭐⭐⭐ "Perfect for Gray Iron" - David B., USA
"Running these on brake rotors. The MC5015 grade handles the abrasive nature of cast iron significantly better than general-purpose inserts."
⭐⭐⭐⭐⭐ "Original Quality" - Hans G., Germany
"Authentic Mitsubishi. Consistent tool life across every edge. Very stable for high-volume production."
⭐⭐⭐⭐ "High Speed Performance" - Yuki T., Japan
"The wear resistance at 350 m/min is impressive. Cuts through ductile iron without any cratering issues."
⭐⭐⭐⭐⭐ "Great Life" - Robert K., Canada
"6 edges per insert makes this very cost-effective. Fast delivery and original packaging."
⭐⭐⭐⭐⭐ "Tough Tooling" - Felipe S., Brazil
"Even with scale on the casting surface, the WNMA geometry holds up. Highly recommended for heavy turning."
Technical Q&A
Q: Can WNMA080408 be used for steel?
A: It is not recommended. WNMA (Flat Top) lacks a chipbreaker for steel's long chips. For steel, use WNMG with a grade like MC6025.
Q: Is this insert double-sided?
A: Yes, it is a negative insert with 6 usable cutting edges (3 on each side).
Q: What is the main benefit of MC5015?
A: It is specifically optimized for abrasive resistance in cast iron, outperforming general grades by preventing rapid flank wear.
Expert Tip: Cast Iron Turning
Because cast iron produces short, powdery chips, high-pressure air or coolant is essential to prevent chip accumulation around the indexable tool, ensuring the high-speed capability of the MC5015 coating is fully utilized.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.